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Abstract

A high speed matrix printer has print hammers spreading across the entire width of a print line for striking dots, which were embossed on a metal band or metal fingers, which in turn strike an inked ribbon for producing characters on a printing medium. The dots are arranged on a single level on the band, and the paper steps a single picture element (pel) after a single line of dots is completed. For 5 x 7 matrix character printing, seven paper increments are required to complete a print line (character line). The printing speed and resolution are limited due to the number of paper increments.

Country

United States

Language

English (United States)

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Two Dimensional Dot Arrangement on a Print Band

A high speed matrix printer has print hammers spreading across the entire
width of a print line for striking dots, which were embossed on a metal band or
metal fingers, which in turn strike an inked ribbon for producing characters on a
printing medium. The dots are arranged on a single level on the band, and the
paper steps a single picture element (pel) after a single line of dots is completed.
For 5 x 7 matrix character printing, seven paper increments are required to
complete a print line (character line). The printing speed and resolution are
limited due to the number of paper increments.

A higher printing speed is achieved by an arrangement of embossed dots in a
two-dimensional fashion, as shown in Figs. 1 and 2. With the movement of the
band, the hammer can cover a whole character of dots without incrementing the
paper. The paper steps after printing a character line instead of a dot line. The
throughput and the print quality are improved by eliminating paper movements
within s character.

This arrangement also allows one to vary print resolution by simply changing
a print band without other printer hardware alteration. A seven-dot high band is
shown in Figs. 1 and 2. There are seven dots spread over a character height,
achieving 5 x 7 matrix printing. A band with more dots spread over the hammer
height results in higher resolution printing.

In summary, the two-dimensional dot arrangement has the
following adva...